public async Task openAndPlay(string location,
string inputFormatName = null, string audioLocation = null,
string audioFormatName = null, List <String> subtitleLocations = null)
{
try
{
// cancel any previously running open operation
CancellationTokenSource prevCancelTokenSource = CancelTokenSource;
Task prevOpenTask = OpenTask;
CancellationTokenSource newCancelTokenSource = new CancellationTokenSource();
CancelTokenSource = newCancelTokenSource;
await close(prevCancelTokenSource, prevOpenTask);
// open video
newCancelTokenSource.Token.ThrowIfCancellationRequested();
VideoLocation = location;
OpenVideoArgs args = new OpenVideoArgs(location, inputFormatName, audioLocation, audioFormatName);
OpenTask = Task.Factory.StartNew(() => videoDecoder.open(args, DecodedVideoFormat, newCancelTokenSource.Token), newCancelTokenSource.Token);
await OpenTask;
if (videoDecoder.HasVideo)
{
videoRender.initialize(videoDecoder.Width, videoDecoder.Height);
Subtitles.clear();
Subtitles.findMatchingSubtitleFiles(location);
if (subtitleLocations != null)
{
foreach (String subtitleLocation in subtitleLocations)
{
Subtitles.addSubtitleFile(subtitleLocation);
}
}
Subtitles.Track = 0;
}
DurationSeconds = videoDecoder.DurationSeconds;
HasAudio = videoDecoder.HasAudio;
previousVideoPts = 0;
previousVideoDelay = 0.04;
audioDiffAvgCount = 0;
if (videoDecoder.HasAudio)
{
audioPlayer.initialize(videoDecoder.SamplesPerSecond, videoDecoder.BytesPerSample,
Math.Min(videoDecoder.NrChannels, 2), videoDecoder.MaxAudioFrameSize * 2);
audioDiffThreshold = 2.0 * 1024 / videoDecoder.SamplesPerSecond;
}
VideoState = VideoState.OPEN;
play();
}
catch (VideoLib.VideoLibException)
{
VideoState = VideoState.CLOSED;
//log.Error("Cannot open: " + location, e);
throw;
}
}
